C#对称加密怎样快速入门 655Z技术栈

要快速入门C#对称加密，你可以使用.NET Framework中的System.Security.Cryptography命名空间提供的类来实现。以下是一个简单的示例代码，演示如何使用AES算法进行对称加密和解密：

using System; using System.Security.Cryptography; using System.Text; class Program { static void Main() { string plainText = "Hello, world!"; string key = "0123456789abcdef"; // 16字节的AES密钥 string iv = "abcdef9876543210"; // 16字节的初始化向量 byte[] encryptedBytes = EncryptStringToBytes_Aes(plainText, key, iv); string decryptedText = DecryptStringFromBytes_Aes(encryptedBytes, key, iv); Console.WriteLine("Encrypted: " + Convert.ToBase64String(encryptedBytes)); Console.WriteLine("Decrypted: " + decryptedText); } static byte[] EncryptStringToBytes_Aes(string plainText, string key, string iv) { byte[] encrypted; using (Aes aesAlg = Aes.Create()) { aesAlg.Key = Encoding.UTF8.GetBytes(key); aesAlg.IV = Encoding.UTF8.GetBytes(iv); ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV); using (MemoryStream msEncrypt = new MemoryStream()) { using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) { using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) { swEncrypt.Write(plainText); } encrypted = msEncrypt.ToArray(); } } } return encrypted; } static string DecryptStringFromBytes_Aes(byte[] cipherText, string key, string iv) { string plaintext = null; using (Aes aesAlg = Aes.Create()) { aesAlg.Key = Encoding.UTF8.GetBytes(key); aesAlg.IV = Encoding.UTF8.GetBytes(iv); ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV); using (MemoryStream msDecrypt = new MemoryStream(cipherText)) { using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) { using (StreamReader srDecrypt = new StreamReader(csDecrypt)) { plaintext = srDecrypt.ReadToEnd(); } } } } return plaintext; } }

在这个示例中，我们使用了AES算法来加密和解密字符串。你可以根据自己的需求调整密钥和初始化向量的长度，并根据具体情况选择其他对称加密算法。希望这能帮助你快速入门C#对称加密。

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